air bag light flashing 2 hours later battery is dead

Possible causes: Airbag Battery Backup Depleted (replace & may have to use a scan tool that can access the airbag module/Airbag Light Reset Soft Code.) Airbag Module Got Wet or Corroded (replace). Airbag Clock Spring Needs Replacing (This is a popular problem on older model vehicles. The only way to determine if your clock-spring is damaged is to have a repair shop diagnose your airbag warning light with a scan-tool. The scan-tool will provide the technician with a DTC or Soft-Code and advise him if the the clock-spring needs replacement.)